Staple pulling machine



7 Dec. 4, 1934. c. A. ROBINSON STAPLE PULLING MACHINE Filed June 9, 1932 Patented Dec. 4, 1934 UNITED STATES PATENT OFFICE STAPLE PULLING MACHINE Charles A. Robinson, Salem, Mass, assignor to United Shoe Machinery Corporation, Paterson, N. J., a corporation of New Jersey I Application June 9, 1932, Serial No. 616,165

. 11 Claims.

This invention relates to machines for pulling fastenings and is herein illustrated as embodied in a machine for pulling staple fasten out by hand or by machine, heretofore a'comr paratively slow process. This results from the fact that considerable care must be taken to locate each staple relatively to the pulling tool so that during its operation the tool will not engage. the legs of the staple in such a way as to bend it, thereby making it difficult towithdraw without causing injury to the shoe, but will advance beneath the cross bar of the staple in position to pull it. n

It is an object of the present invention to provide an improved fastening pulling machine which will be adapted to the pulling of fastenings such as staple fastenings which have been driven into a shoe temporarily to secure together the upper and insole. To this end, and as i1- lustrated the invention provides. a fastening pulling machine comprising a normally inoperative pulling member relatively to, which a fastening in the work can readily be located in position to be pulled, together with means for rendering the tool operative to pull the fastening upon presentation of the work to the tool. Preferably, and as shown, the tool is pivotally mounted upon the frame of the machine and is arranged for movement heightwise thereof when the tool is engaged by the work, there being a continuously oscillated member adapted to engage an abutment upon the tool to cause oscilla-' tion' of the tool in pulling a fastening from the work.

The construction above outlined is advantageous in that the work, such as a shoe, can be located relatively to the tool with the latter in effective position for pulling a fastening, such as a staple, while the tool is at rest, thus expediting the pulling operation and eliminating any likelihood of injury to the shoe by the tool while it is in motion.

Other objects and features of the invention will be apparent from the following detailed k515i description when taken in connection with the (CI. 12-16) I accompanying drawing and will be pointed out in the claims.

In thedrawing,

Fig. *1 is a side elevation of a fastening pulling machine illustrating one embodiment of the in-,

vention;

Fig. 2 is a detail viewpartly in section of the fastening pulling mechanism; and

Fig. 3 is a perspective view showing the forward portion of the machine with the pulling tool in operative engagement with the work.

As shown, in the drawing, the invention is illustrated as embodied in a machine for pulling staple fastenings such as staples 10 driven through the upper 12 and into the insole 14 of a, 1

shoe. such as shoe 16, the pulling operation being performed by a pulling tool 18 pivotally mounted in the frame 20 of the machine and arranged to be oscillated by a driver bar 22.

The tool 18 comprises anelongated shank 24' having at its lower end a curved work-engaging portion 26. Extending from the forward side of the shank 24 is a projection 28 in the form of a wedge-shaped claw or tooth the under surface of which constitutes a continuation of the surface 26. The projection28 is'of such dimensions that it can be inserted readily between the legs and beneath the cross bar of staples to be pulled which ordinarily extend slightly abovethe surface of the upper of the shoe.

The tool 18 is carried by a slide 30 secured to the frame 20 by a bolt 32 passing through an elongated slot 34 in the slide and so arranged that the slide can be secured in various positions heightwise of the frame and driver bar 22. The slide is provided with a slot 36 within which the tool 18 is mounted upon a pin 38 which extends through an elongated opening 40 in the upper portion of the shank 24. The tool 18 is normally forced downwardly so that the 5 pin 38 is in engagement with the upper portion of the wall of the opening 40, this being accomplished by a spring 41 connecting the upper end of the shank 24 to a pin 42 carried by ears 43 of the slide 30. This arrangement permits 44 is a shoulder or abutment 46 which is adapted therein in operative position relatively to the pulling tool 18. The slide is also provided with shoulders 52 above the gage portion and exf tending forwardly therefrom, providing stops for limiting upward movement of the shoe as it is presented to the tool. e

The driver bar 22 is arranged to beoscillated continuously by an eccentric 54 mounted upon shaft 56 and arranged to be driven by suitable means such as pulley 58.

In the operation of the machine, the pulling tool 18 is normally held in its lowermost or inoperative position in which position the: driver bar 22 does not engage it, with the result that the tool is stationary. A shoe is presented to the tool bottom up with the side of the shoe in contact with the gage 50 and a staple therein located in alinementwith the tool. The shoe is then forced upwardly toward the shoulders 52 and into engagement with the curved surface 26 of the tool 18 which is shifted heightwise upon its pivot pin 38 with the result that the shoulder 46 is brought into alinement with the driver bar 22 and upon the next forward movement of the bar the tool will be swung forwardly about the axis of the pin 38, with the result that the claw 28 will be swung beneath the cross bar of the staple, such as staple ,10 as illustrated in Fig. 2, and will pull the staple from the shoe. It is to be noted'that thecurvedl surface 26 of the tool limits upward movement of the shoe bottom during the pulling movement, while the claw 28 is oscillated away from the shoe to pull the staple. When the shoe is disengaged from the tool the spring 38 will lower the tool to render it temporarily inoperative and the shoe can then be positioned with another staple in alinement with the claw andjthe operation repeated.

Having described the invention, whatI claim as new and desire to secure by Letters Patent of the United States is:-- I

1. A fastening pulling machine, comprising a frame, a pulling tool mounted on the frame for pivotal movement and for movement heightwise of the frame, and a movable member operable upon heightwise movement of the tool to cause oscillation of the tool for pulling a fastening from work presented to the tool.

2. A fastening pulling machine, comprising a frame, a tool carried'by the frame and mounted for oscillation relatively to the frame and movable bodily relatively to the frame, and a driving member operable upon bodily movement of the tool for causing oscillationof the tool to effect the pulling of a fastening from work presented to the tool. i

3. A fastening pulling machine, comprising a frame, a driving member, a pivot carried by the frame, a fasteningpulling tool loosely mounted upon the pivot, and an abutment upon the tool movable therewith into position to be engaged by the driving member upon forcing work against the tool. I l

4. A fastening pulling machine, comprising a frame, a continuously operated driving member a pivot carried by the frame, and a fastening pulling tool loosely mounted upon the pivot and having an abutment movable with the tool into operative engagement with the driving member to cause oscillation of the tool.

5. A machine for pulling staple-fastenings from shoes, comprising a frame, an oscillatory staple-fastening pulling tool mounted for movement heightwise of the frame, and a driving member operable upon forcing a shoe against the tool for causing oscillation of the tool to pull a staple-fastening from the shoe.

6. A machine for pulling staple-fastenings from shoes,comprising a frame, a continuously operateddriving means, a staple-fastening pull- .ing tool, means for mounting the pulling tool on the frame for movement heightwise thereof, means operable upon forcing the work in a direction heightwise of the frame against the tool to cause operative engagement of the tool and driving means, and' means normally operable to maintain the tool in, inoperative position relatively to the driving means.

7. A fastening pulling machine, comprising a frame, a pulling tool pivotally carried by the frame, continuously operated means for engaging the pulling tool to cause it to oscillate, means normally operative to hold the tool out of engagement with the continuously operated means, and a gage for locating thework relatively to the tool when the latter is in inoperative position.

8. A fastening pulling machine, comprising a frame, a pulling tool pivotally mounted upon the frame for movement heightwise thereof, means for oscillating the pulling tool comprising a continuously operated member, an abutment upon the tool forming an operative connection between the tool and the continuously operated member, and means for rendering the tool normally inoperative.

9. A fastening pulling machine, comprising a frame, a pin carried bythe frame, a pulling tool loosely mounted upon the pin for movement heightwise of the frame, the tool having a recessed portion and an abutment adjacent thereto, a driving. member operable to engage the abutment to oscillate the tool, and means normally operative to position the tool with the recessed portion thereof in alinement with th driving member. I

10. A fastening pulling machine, comprising a frame member having a shoe engaging shoulder, a pin carried by the frame member, a fastener pulling tool loosely mounted upon the pin and having an end portion normally projecting beyond the shoulder,'a driving member for oscillating the tool, and means operated upon presentation of a shoe against the shoulder in position to engage the end portion of the tool for causing the driving member to engage the tool.

11. A fastening pulling machine, comprising a frame, a tool pivotally mounted in the frame CHARLES A. ROBINSON. 

